ul,
ol {
  list-style: none;
}
html,
body,
#root {
  height: 100%;
}
h1,
h2,
h3,
h4,
h4,
h5 {
  margin: 0;
  padding: 0;
}

a {
  color: #666;
  display: block;
  text-decoration: none;
}

/* 清除浮动 */
.clearfix:after {
  content: "";
  display: block;
  visibility: hidden;
  height: 0;
  clear: both;
}

.clearfix {
  zoom: 1;
}